Patents by Inventor Michio Nagatomo

Michio Nagatomo has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Heat fixing roll for copying machine, method of producing the same and electronic copying machine provided with the same
    Patent number: 5065193
    Abstract: A heat fixing roll for a copying machine includes an insulating layer formed on the surface of a hollow tube, a heating resistor layer formed on the surface of the insulating layer by uniformly thermal spray coating a resistor material, a screw-like heating resistor formed by forming a helical groove having a depth reaching the surface of the insulating layer by using a laser irradiation head connected to an electric resistance compensator, and an antisticking layer formed on the surface of the resistor and the groove by coating. The present invention also provides a method of producing the heat fixing roll and an electronic copying machine provided with the roll.
    Type: Grant
    Filed: May 18, 1990
    Date of Patent: November 12, 1991
    Assignee: Onoda Cement Co., Ltd.
    Inventors: Hiroshi Saitoh, Michio Nagatomo, Hideo Nagasaka